1. Molecular Quantum Mechanics, 4th ed. (Eds.: P. W. Atkins, R. S. Friedman), Oxford, New York, 2005;
2. Quantum Mechanics in Chemistry (Eds.: J. Simons, J. Nichols), Oxford, New York, 1997.
3. Encyclopedia of Nuclear Magnetic Resonance (Eds.: D. M. Grant, R. K. Harris), Wiley, New York, 1996;